Hi guys,
Compiler breaks trying to compile gtkmm-3.19.5 due to a typedef redeclaration of GtkBorder. Effectively, this type was already declared in gtk+-3.19.5 / gtkborder.h and after then, in gtkmm/border.h, we can read,
#ifndef DOXYGEN_SHOULD_SKIP_THIS
extern "C" { typedef struct _GtkBorder GtkBorder; }
#endif